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@uitrit tetes datent @ffice Letters Pfam Naseem, afee emma/29,1868.

IMPROVEMENT IN STEAM-GENERATORS.

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TO A-LL WHOM IT MAY CONCERN:

Beit Vknown that I, MARSHALL TURLEY, of Council Bluls, in the county ofPottawatomie,'and State of' Iowa, have invented a new and usefulImprovement in Steam-Boilers; and I do hereby declare that the followingis afull, clear, and exact description thereof, which will enable thoseskilled in the art to make and use the same, reference being had to theaccompanying drawings, forming part of this specification. v

This invention relates to improvements in boilers for generating steam,whereby the greatest amount of steamlgenerating or fire-surface isobtained, and danger from bursting or over-pressure is avoided; and itconsists in the arrangement vof parts, as will be hereinafter more fullydescribed.

Figure 1 represents a sectional elevation of a boiler constructedaccording to my invention, the sectio'n being through the line a: z ofg. 2,.

Figure 2 is a horizontal section of fig. 1, through 4the line y y.

Similar letters of reference indicate corresponding parts.

A represents the outercasing, which surrounds the boiler, which may bemade of sheet iron, or brick, or other material. i Y

vB represent-s the stand or pedestal. l

C represents globular-shaped sections, more or less in number, whichstand on toppof each other, forming steam-tightjoints between, as seenin the drawing. 'l v D represents the hollow arms, being pear-shapedseparate vessels, which are screwed into. the sections C.

These vessels stand in an inclined position, so thatvany sediment orscale contained therein may be readily blown out whenever it isnecessary to clean the boiler. l

E is the {ire-box. h

The sections C are confined together by a single central bolt, F, whichpasses upward from the cavity g,

in the base or pedestal B, through all the sections, with a nut on itsend bearing upon the npper'section, asseeu in the drawing. Y

The ends of these sections., where they come-in contact, are turned of?true, sorthat av tight ljoint is formed,

or packing may be used, if necessary, informing the joint.

Each section has any required number of the arms D radiating from it,and they are so arranged that the v arms of the sections above, standover the spaces between the sections below them, so that the heatedproducts of combustion are deflected, and retarded in their ascent, andmade to lap round the arms, thus compelling the heated gases to partwith their caloric. i l

It will thus be seen that the sections and arms form steam-generatingsurface. The number of sections, as wellas their size, will depend uponthe amount of steam required, but the number can be increased ordiminished, by altering the length of the central bolt F.' v v By thisconstruction of a steam-generator, the danger from explosion is avoided,as a single arm may explode without any serious consequences, butthemetal in this form will 4withstahd much more pressure than is requiredof ordinary boilers underl'any circumstances.

In this example of my invention, I have not deemed it important to showthe boiler-connection, as when i in working-order, my object beingtoillustrate my idea of a sectional boiler, one that may be readilytransported, andput together in locations and 'situations which wouldpreclude the use of the` ordinary steam-boiler. y The facility withwhich theboiler may be increased in size and power, in caseof necessity,and repaired, in case of failure of anypart'icular part, s aconsideration of the highest importance.

I claim as' new, and desire to secure by Letters Patent* The arrangementof the separate globular sections C, with the hollow upward inclinedAscrew-arms D, as herein shown and described.

MARSHALL TURLEY.

Witnesses:

Dr. J. K. Mouse, DrfF. C. CLARK.

